东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2007, Vol. 28 ›› Issue (4): 545-548+552.DOI: -

• 论著 • 上一篇    下一篇

小波分析在转子裂纹故障中的应用

任朝晖;马辉;王德明;宋乃慧;   

  1. 东北大学机械工程与自动化学院;东北大学机械工程与自动化学院;葫芦岛锌厂;东北大学机械工程与自动化学院 辽宁沈阳110004;辽宁沈阳110004;辽宁葫芦岛125003;辽宁沈阳110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2007-04-15 发布日期:2013-06-24
  • 通讯作者: Ren, Z.-H.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(10572036)

Application of wavelet transform to crack fault diagnosis for rotor systems

Ren, Zhao-Hui (1); Ma, Hui (1); Wang, De-Ming (2); Song, Nai-Hui (1)   

  1. (1) School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China; (2) Huludao Zinc Industry Co. Ltd., Huludao 125003, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2007-04-15 Published:2013-06-24
  • Contact: Ren, Z.-H.
  • About author:-
  • Supported by:
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摘要： 为了模拟现实生产中旋转机械出现的转子裂纹故障,在单跨转子实验台上,对含有裂纹的转子系统进行了实验,把采集到的故障信号,利用三维谱振图和小波尺度图结合进行分析.结果表明:两种方法相结合可以更好地揭示裂纹故障信号的频率结构,特别是在1/2临界转速下能检测出能量相对较小的二倍频分量;系统在2倍临界转速时,会产生1/2次谐波共振,随着裂纹的加深,会产生高次谐波,这些频率特征可以作为诊断裂纹故障的一个依据.

关键词: 单跨转子系统, 裂纹故障, 再分配小波尺度图, 小波分析, 故障诊断

Abstract: Simulation experiments were carried out on a test rig for single-span rotor system with crack fault and the collected fault signals were analyzed by way of a 3-D waterfall spectra in combination with reassigned wavelet scalogram. The results showed that the combination can reveal the frequency structure of signal better, especially the relatively low-energy twofold frequency component which can be measured at half of the critical speed. It was found that an one-half order harmonic or subharmonic resonance comes up at twofold critical speed and with the crack deepened further, high order harmonics occur. These frequency characteristics features can be regarded as a reference to diagnosing the crack fault.

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